org.springframework.expression.spel.ast

Class ValueRef.NullValueRef

java.lang.Object

org.springframework.expression.spel.ast.ValueRef.NullValueRef

All Implemented Interfaces:

ValueRef

Enclosing interface:

ValueRef

public static class ValueRef.NullValueRef
extends java.lang.Object
implements ValueRef

A ValueRef for the null value.

Nested Class Summary

Nested classes/interfaces inherited from interface org.springframework.expression.spel.ast.ValueRef

ValueRef.NullValueRef, ValueRef.TypedValueHolderValueRef

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static ValueRef.NullValueRef	instance

Constructor Summary

Constructors

Constructor and Description
ValueRef.NullValueRef()

Method Summary

Methods

Modifier and Type	Method and Description
TypedValue	getValue() Returns the value this ValueRef points to, it should not require expression component re-evaluation.
boolean	isWritable() Indicates whether calling setValue(Object) is supported.
void	setValue(java.lang.Object newValue) Sets the value this ValueRef points to, it should not require expression component re-evaluation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

instance

static ValueRef.NullValueRef instance

Constructor Detail

ValueRef.NullValueRef

public ValueRef.NullValueRef()

Method Detail

getValue

public TypedValue getValue()

Description copied from interface: ValueRef

Returns the value this ValueRef points to, it should not require expression component re-evaluation.

Specified by:

getValue in interface ValueRef

Returns:

the value

setValue

public void setValue(java.lang.Object newValue)

Description copied from interface: ValueRef

Sets the value this ValueRef points to, it should not require expression component re-evaluation.

Specified by:

setValue in interface ValueRef

Parameters:

newValue - the new value

isWritable

public boolean isWritable()

Description copied from interface: ValueRef

Indicates whether calling setValue(Object) is supported.

Specified by:

isWritable in interface ValueRef

Returns:

true if setValue() is supported for this value reference.